Fix typo: 'Form' to 'form' since it is a HTML element

[gbj]

This should actually read <FancyForm/> instead of <Form/>, given the context in the sentence before:

For example, imagine I have a <FancyForm/> component that enhances an HTML <form>. I need some way to pass all its inputs.

[NCura]

I initially misunderstood the code example, thinking it was the body of the FancyForm component function, which made the previous sentence unclear. Changing "Form" to "FancyForm" clarifies everything. Can I update this pull request to fix the typo correctly (I don't know if that is even a thing), or should I close it and create a new one with the correct fix?

[gbj]

Just updating this PR is great :-)

[NCura]

Done!